Where it comes from
The line in the source
１９９９―２０２１年までは日米合わせて年間１００万枚ほどだった注文が、２２年以降は毎月１００万枚に激増し Explore / Figure
Record
PSA orders pre-2022, US+Japan, 1999–2021
1 million cards per year 1999–2021
EstimateOur model or estimate. Treat it as an order of magnitude.
Found in one pass only. The research team reads every source twice, independently; this record turned up in one reading but not the other, so treat it as less certain than its grade.